Application of Strength Reduction Method in Stability Analysis of A Landslide with High Water Content

According to the features of landslide —rock breaking,abundant groundwater,high water content,small thickness and large area,and poor stability as well as combined with the engineering geological characteristics of Maixiushan area,the paper selected Maixiushan 1~# landslide to analyze the stability of landslide with the Strength Reduction Method through FLAC-3D Finite Difference Program.With the reduction of the strength index of the rock mass of slide,a state was defined as the critical failure while the plastic zone appeared successionally from the toe to the head of the slope,and the displacement value of the characteristic points on the slide mass changed in a sudden and increased unlimitedly.The reduction factor of the strength at the critical failure was regarded as the stability factor of the slope,meanwhile the potential slide zone could be discovered,for revealing the failure mechanism of High-Water-Content landslide.The results showed that the strength reduction method was not only able to simulate the actual process of the slope failure,but also the safety factor obtained from this method was more confirmable to the real slope stability state. In a word,this method was fairly advantageous in stability analysis of landslide.